*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
.header{
	width: 100%;
	height: 70px;
	background-color: white;
	position: fixed;
	top: 0;
	left: 0;
}
.header .headerContent{
	width: 1200px;
	height: 48px;
	margin: auto;
}
.header .headerContent img{
	float: left;
	margin-top: 10px;
}
.header .headerContent .nav{
	width: 600px;
	height: 48px;
	float: right;
	text-align: center;
	line-height: 48px;
}
.header .headerContent .nav a{
	color: #a4a4a4;
	margin-left: 40px;
}